Weakening of magnetohydrodynamic interchange instabilities by Alfv́n waves

E. S. Benilov; A. B. Hassam

doi:10.1063/1.2837516

Weakening of magnetohydrodynamic interchange instabilities by Alfv́n waves

E. S. Benilov, A. B. Hassam

Department of Mathematics and Statistics

University of Maryland, College Park

Research output: Contribution to journal › Article › peer-review

Abstract

Alfv́n waves, made to propagate along an ambient magnetic field and polarized transverse to a gravitational field g, with wave amplitude stratified along g, are shown to reduce the growth rate of interchange instability by increasing the effective inertia by a factor of 1+ (B- y′ B- z kz)2, where B-z is the ambient magnetic field, kz is the wavenumber, and B-y′ is the wave amplitude shear. Appropriately placed Alfv́n wave power could thus be used to enhance the stability of interchange and ballooning modes in tokamaks and other interchange-limited magnetically confined plasmas.

Original language	English
Article number	024502
Pages (from-to)	-
Journal	Physics of Plasmas
Volume	15
Issue number	2
DOIs	https://doi.org/10.1063/1.2837516
Publication status	Published - 2008

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Weakening of magnetohydrodynamic interchange instabilities by Alfv́n waves

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